Gary,
The best specifications that I have found are:
* South Korea 220V +/-10%, 60Hz +/-4%.
* North Korea 220V +6.8% -13.6%, 60Hz +0.0% -5.0%.
We use linecords with Schuko (CEE7 VII) plugs for both countries.
South Korea changed from a 110V 60Hz standard a few years ago. For several
years they required all electronic products imported into their country to
operate only on 220V power, to force their people to make the changeover. This
was a real pain for us, because we prefer to design our power supplies to have
an IEC 320-C13 or IEC 320-C7 appliance input, and operate from 90-265V 47-63Hz,
to minimize the number of product variants we have to manufacture and control.
The last I heard, a couple of years ago, South Korea was again permitting
products with universal power supplies to be imported since their primary-power
changeover was complete.
One of our Product Safety Engineers and I have put together a webpage that
summarizes 54 sources of information on primary voltages, frequencies, plugs,
languages, and safety-approval marks for 310 counties. We will make it
publicly available as soon as my manager gives his okay.
John Barnes Advisory Engineer
Lexmark International
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